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Investigation of Factors Effecting Postoperative Refraction Outcomes Using Haigis Formula

Poster Details

First Author: Ü.Doğan TURKEY

Co Author(s):    U. Dogan   F. Ulas   A. Kaymaz   A. Soydan   E. Uyar   S. Celebi

Abstract Details


Investigation of factors effecting postoperative refraction after phacoemulsification surgery using Haigis formula incorporated into optical low coherence reflectometer (Lenstar LS 900).


Abant İzzet Baysal University Department of Ophthalmology


The study included 159 eyes of 134 cataract patients aging between 47 and 93 years and undergoing uncomplicated phacoemulsification surgery. Preoperatively axial length (AXL) , anterior chamber depth (ACD) and lens thickness (LT) of the patients were measured using low coherence optic reflectometry (Lenstar LS 900 Haag-Streit AG, Koeniz, Switzerland).Intraocular lens power calculation was performed using Haigis formula and postoperative spherical refraction was measured at the end of first month. The relationship between postoperative spherical refraction and AXL, ACD, and LT was investigated using Pearson correlation analysis test.


The mean postoperative spherical refraction, mean AXL, mean ACD and mean LT were -0.15±0.56 D (-2.00 to +1,25 D), 23.31±0.90 mm (20,83-28,53 mm) , 2.72±0.38 mm (1,81-4,73 mm) and 4.30±0.45 mm (2,93-5,52 mm), respectively. The prediction of error and absolute prediction of error for Haigis formula were -0.36±0.79 and 0.62±0.61 D, respectively. No significant correlation was identified between postoperative spherical refraction and AXL, ACD, and LT ( r values were 0.036, 0.006, and 0.002, respectively and p values were 0.652, 0.942, and 0.979, respectively).


Haigis formula showed good refractive outcomes after uncomplicated phacoemulsification surgery. Postoperative spherical refraction using Haigis formula did not affected by AXL, ACD, and LT in the study group.

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